Apparatus for governing and controlling marine or other engines.



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APPARATUS FUR GOVEBNING AND CONTROLLING MARINE 0R OTHER ENGINES.

(Lpplcationled Sept. 11, 1899.)

8 Sheets-Sheet l.

`(No Model.)

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L l I l I x No. 660,318. Patented Oct. 23, |900.

E. A. SPERRY.

APPARATUS FOR GOVERNING AND COHTROLLING MARiNE 0R`0THER ENGINES.

(Application filed Sept. 11, 1899.)

(No mm1.)

8 shuts-Sheet 2.

Patented Oct. 23, |900.

8 Sheets-Sheet 3.

I fnl/@mfom E. A. SPERRY.

APPARATUS FOR GOVERNING AND CONTRULLINGMARINEOR OTHER ENGINES.

(Application led Sept. 11, 1899,)

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No. 660,3l8.

(No Model.)

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Nn. esola.

E. A. SPERRY.

Patented Oct. 23, |900.

APPARATUS FOR GOVERNING AND CONTRULLING MARINE 0R OTHER ENGINES.

(No Model.)

(Application fled Sept. 11, 1899.)

a sheets-sheet 4.

u--r- I ll lluvl E. A. SPERRY.

Patented Oct. 23, |900.

APPARATUS FOR GOVERNING AND CUNTROLLING MARINE 0R OTHER ENGlNES.

(Application led Sept. 11, 1899.)

lNo Model.)

@xlib/wwe@ im u afm/lio@ ma mams Pneus co wma-Limo,wumamm D c No. 660,318. Patented Oct. 23, |900. E. A. SPERRY.

APPARATUS FOR GDVERNING AND CONTROLLING MARINE 0R OTHER ENGINES.

(Application fled Sept. 11, 1899.)

8 Sheets-Sheet 6.

{No.Mudel.)

No. 660,318. Patented Oct. 23, |900. E. A. SPERRY.

APPARATUS FOR GOVERNING AND CONTROLLING-MARINE 0B .OTHER ENGINES.

(Application fled Sept. 11', 18993 8 Sheets-Sheet 7,

(No Mndel.)

ZAM;

No. 660,318. Patented Oct. 23, 1900.

E. A. SPERRY."

APPARATUS FOR GOVEBNING AND CONTROLLING MARINE 0R OTHER ENGINES.

`Applicaton filed Sept. 11, 1899.)

lNo Model.) 8 Sheets-Sheet 8.

UNITED STATES PATENT Ormes.

ELMER A. SPERRY, OF CLEVELAND, OI-HO.

APPARATUS FOR GOVERNING AND CONTROLLING MARINE OR OTHER ENGINES.

SPECIFICATION forming part of Letters Patent No. 660,318, dated October 23, 1G00.

Application filed September 1], 1899. `Serial No.730.196. (No model.)

lli

10 all whom, zit ntf/,g concern.-

Be it known that I, ELMER A. SPERRY, a citizen ofthe United States, residing at Cleveland, in the county oi Cuyahoga and State of Ohio, have invented certain new and useful Improven'icnts in Apparatus for Governing and Controlling Marine or other Engines; and I do hereby declare that the following specification, taken in connection with the drawings furnished and forming a part of the same, is a clear, true, and complete description of my invention.

My invention relates to apparatus for governing and controlling the speed of marine and other engines; and it has for its object the maintaining ot' a regular and uniform speed or to hold same within certain predetermined limits, regardless ot' varying conditions which may operate t-o diminish or increase the amount. of work heilig performed or the load being carried by the engine during its continuous operation.

My invent-ion has been devised more espocially for use in connection with marine engines where the load carried varies between extremely wide limits and olten instant-aneously from iull load to no load atalhas where, from the pitching of the ship, the propeller is suddenly raised from a \\'ellsubmcrged position entirely out of the water. 'l`he racing of marine engines incident to sudden variations in` the load, and the consequent racking and disintegrating of the parts thereof, as well as of the ship as a whole, has always been a factor requiringl serions consideration in the designing 'and consti-notion of engines of this type, and the speed capacity of such engines has been necessarily limited to the ciiiciency of known governing systems or devices to maintain complete and instant control of I he maximum speed. In governing apparatus nov.7 in use the speed control is regulated by diminishing or increasing the motive power of the engine, as byopening or closing the throttle; but the reactionary mechanical appliances used are wholly inadequate to meet the conditions now demanded in engines of the mari-ic type. Asis well known, racing occu rs in all high-speed marine engines even after the mechanical governor has cut ott' the steam-supply; but it occurs te a much greater extent in engines of the conl pound type, this being due to the presence of steam in the receivers and the vacuum acting on the pistons of the intermediate and low pressure cyliiders. There is a constantly-increasing demand for engines of greater capacity and speed than can be controlled by the governing systems now in use, and my invention has been devised not only to insure prompt and ciiicient speed control of engines as now built and operated, but to enable the working speed ot such engines to be increased almost indefinitely within the maximum limits without liability of danger.

My invention consists, primarily, in automatically applying, withdrawing, and varying an artificial load upon an engineor prime mover acting either alone or in conjunction with other governing or controlling devices, the artificial load being applied, varied, and withdrawn in inverse proportion to variations in the working load carried hy the engine. 'lhis artiiicial load is applied to a moving part of or a part moved by the engine in one of its forms hy means of braking mechanism controlled by a system 0i' electric circuits and devices which are thrown into or ont ot' action by a mechanical governor operating in the usual manner.

After a detail description ot' my invention the features deemed novel will be specified in the claims hereunto annexed.

Referring to the drawings, Figure l illustrates a ma rine engine, partly in side elevation and partly in section, to which my governing apparatus has been applied. Fig. 2 is a front view of the engine of Fig. l. Fig. 3 is a diagrammatic illustration of the devices and electric circuits controlling the braking mechanism. Fig. at is a section of the electric brake shown in Fig. l. Fig. 5 is a face view ofa portion ofsaid brake. Figs.6 and 7 are detail views of one of the mechanically-driven circuit-controllers illustrated in Fig. 3. Fig. 8 illustrates the main circuit-controller in end View and a portion of the electric brake in sectional view and their electric connections. Fig. 9 is a detail oi' the throttle-controlling mechanism. Fig. lO is a diagrammatic view illustrating the main circuits and the watercirculatingsystem of the electric brake. Fig. ll is a sectional view of a preferred form of gzric hrae. Fig. l2 is a side view of a IOO mechanical brake adapted for use in connection with my system. Fig. 13 is a diagrammatic illustrati-on of a modified form of brakecontrolling apparatus embodying the main features of my invention.

It is to be understood that while I have illustrated my invention in connection with a marine engine it is applicable to engines generally, without regard to the particular form thereof or the use to which they may be put.

In the engine shown in Figs. l and 2 the crank-shaft A is directly under the control of the governing mechanism, the artificial load being applied thereto or removed therefrom in inverse proportion to variations in the actual load by means of a brake controlled as hereinafter explained. The brake itself may be in the form of a mechanical brake of any of the well-known typeswsuch, for instance, as Aillustrated in Fig. l2--but I prefer to use an electrical brake because of its great power and the ease with which it maybe controlled. The brake illustrated in Figs. 1 and 2 and in detail in Figs. et and 5 consists of an electromagnet D, which operates against the face of a wheel or disk C, the latter being keyed to the shaft A and constructed, by preference, of rolled or pressed steel. As illustrated in Figs. l and 2, the disk C is secured to the forward end of the shaft A; but it may be secured to the aft end, as illustrated in dotted lines in Fig. l, or to any other rotating part of the engine. The electromagnet D is arranged in juxtaposition to the disk C and consists of a ring ofsoft iron surrounding the shaft A concentric to the axis of the disk.

The magnet D is supported at each side atits outer edges by means of lugs D D D' D', which embrace suitable supporting beams or blocks A' A', secured to the engine-bed, as clearly shown in Fig. 2. The magnet is thus held against rotation, but it is free to slide upon the supports A' A toward and from the disk C, the sliding movement being limited by the disk C in one direction and in the other direction by a fixed stop. (Not shown.)

The ring of which the magnet is composed is made of soft iron, and on one side there is a series of concentric grooves or channels (l,in which is placed the winding or conductors c, the met-al between the grooves forming the cores and pole-faces il S N S N S. (Clearlyshown in Fig. 5.) Radial grooves d are eut through the projecting metal to allow of turning ot' the convolutions necessary for proper distribution ot' the magnet system, the winding being upon three sides only of the projecting metal. rlhe conductorscpass through the radial groove d' at the outer edge of the ring into and around the outer groove d to and through a radial groove d to the next concentric groove d, then around in said groove in a reverse direction to and through a radial groove d to the next concentric groove d, through said third groove in a reverse direction, and so on through all of the grooves to the radial groove d at the i11- ner edge of the ring,where connection is made with the energizing-circuit.

It Will be readily understood that when magnet D is energized its attraction for the disk C will hold the latter against rotation in proportion to its power, which latter will depend upon the strength of the energizing-current as well as upon the number of coils or convolutions through which current is passing. The mechanism for controlling the operation and power ofA magnet D is contained in a box or casing B, (shown in Figs. land '10,) which may be located at any point convenient for connecting a centrifugal orl other mechanical governor. The contents of box B are shown in diagram in Fig. 3, and consist of a centrifugal governor E and other devices I, J, and K for controlling electric circuits, to be presently described. 'lhe governor E is mounted on a shaft e, supported in suitable bearings e' e', and driven from the engine-shaft A by means of a shaft b, geared to the engine-shaft A, as atb', and to the governor-shaft by gears b2 and b3. rlhe governor E consists of a pair of governors of a wellknown type, each consisting of a pair of balls or weights f, mounted on bow-shaped springs f', pivotally connected at their outer ends to collars fzfs, fixed to the governor-shaft e, and similarly connected at their inner ends to sliding sleeves or collars f4 f5, splined to the shaft c, so that the sleeves f'1 and f5 will be moved in opposite directions or toward and from each other by the centrifugal action of the balls or weights f, as will be readily understood. The two sets of'balls are statically balanced by means ot' four bell-crank levers g g g2 g3, each pivotally mounted upon suitable supports at four diametrically-opposite points between the two sleeves f4 f5. Levers gand g are connected to sliding sleeve f4 by pinsl g4 g4, which project from an arm of each of said levers into an annular groove f(i in the sleeve f4. Levers g2 and g3 are similarly counected to sliding sleeve by pinsg1 g4, projecting into a groove f6 in sleeve f5. Levers g and g are connected to levers g2 and g3, respectively, by pins g5 g5 on levers g2 g3, which are embraced by forked ends of levers g and g'. It will thus be seen that by means of the lever connections between the sliding sleeves f4 f5 the two sets of weights are balanced against each other and that the governor cannot therefore be affected by the motion or movements of aship. Bell-crank lever g is provided with a pendent arm G, which when the balls or weightsf are moved outwardly by an increase in the speed of the engine operates to successively close electric circuits, each containing electromagnets which release mechanicallydriven switches controlling the operation and power of the artificial load or brake before referred to. Within the path of arm G is a spring-contact 71 with which said arm engages for closing a circuit containing electromagnet t', the latter operating to trip a pawl for re- ITO leasing a rotary switch I, controlling the initial supply of current to magnet D. A further movement of arm G. causes contact Zt to be moved against a second contact h', which closes a second circuit containing an electromagnetj, the latter operating to trip a pawl and release a mechanically-driven switch J, which cuts out a resistance in the main circuit to increase the current supplied to magnet D. A further movement of arm G causes contact h to move against a third contact h2 and close a third circuit containing electromagnet Zo, which releases a third mechanically-driven switch K, the latter operating to cut out a second resistance and still further increase the current in the main circuit.

- rlhe switch I is revolved for making, breaking, and reversing the main current, and the switchesJand K are revolved for making and breaking auxiliary circuits when released by the pawls controlled by the electromagnets i, jj, and 7c, respectively; but each switch is revolved only a predetermined distance at each l making and breaking of its electromagnetcircuit. The switches may derive their ro tary motion in any suitable manner; but I prefer that they be driven by frictional contact with some moving portion of the engine or apparatus, preferably from the shaft Z), i-nterior to inclosure B. For convenience of illustration I have shown the switches as deriving their rotary motion from a 'shaft b4, geared to a shaft b5, the latter being geared to the shaft b, as shown. Each of the switches I, J, and K consists of a drum or cylinder t" j'k' on a shaft 7a2, mounted in suitable bearings and carrying a band wheel or pulley 33's 7c3, and each band-wheel is coupled by a belt h6 to a pulley t7 on shaft b4. Shaft b4 is in continuous motion during the running of the engine; but the switches do not revolve until permitted to do so by the operation of their pawls, the belt-s ZJG slipping upon the pul leys, while switches remain stationary. 'lhe cylinder or drum 'L" of switch I is provided with six contact-bars equally spaced and separated from each other by insulated spaces which are equal in width to the width of the bars, so that each division of the cylinder occupies one-twelfth of its circumference. The bars Z Z Z are insulated from each other and from other portions of the device, and the intervening bars Z Z Z' are each electrically connectedto the shaft Z2, as shown at Z2, Fig. 8, and they may also be connected together, as at Z3. Two brushes H l-I/ contact with the surface of the cylinder and are arranged so that one will rest on a bar Z, while the other rests on a bar Z', or both on insulated spaces, as shown. At one end of the cylinder are two brushes Z4 Z5, arranged to contact with the ends of contact-bars Z, which extend to the end oi the cylinder. Contact-bars Z do not extend to the end of the cylinder and do not there* fore come in contact with the brushes Z4 Z5.

A. brush Z6 bears on the end of shaft ft2, and

these brushes form connections for the circuits to be described.

Switch I is normally held against rotation by pins 'Z4 i5, projecting from pulley Z? in the path of adouble-acting pawl '116, controlled by the electromagnet t'. Pawl'i6 (see Fig. 8) is pivoted, as at t7, and at its outer end it is provided with two oppositely-disposed hooks s Z9, connected together by an arched connection ,7210, which permits the pins to pass thereundervto the hooks. Pawl i is moved toward the magnet by means of the armature tu, to which it is attached, but is normally held away from the magnet by the retractile springt. An adjusting-screwis provided for, properly adjusting the movement of the pawl with relation to the pinsvl4 i5. The pins Z4 t4 Z4 (shown in dotted lines in Fig. 8) are equally spaced in line to be engaged by the upper hook i8 of the pawl Z6-when the latter is in the position shown. The pins 715115 'Z5 are each arranged thirty degrees orone-twelfth of a circle to the rear of the pins 4 and in line to be engaged by hook i9 when the pawl is moved by the electromagnet fi.

The cylinder-7" of switch J is provided with six contact-bars m equally spaced and separated from each other by insulated spaces of equal width with the bars, and the latter are each connected to the shattjz, as shown atj4 in Fig. 7. A brush J bears upon thesurface of the cylinder, and at each end of the shaft `7'2 are contact-brushes j5j6, forming circuit connections to be presently described. On pulleyy'3 are twosets of pinsj8 (i9, .which are alternately engaged byhooksjlojuof pawlji, which is an exact counterpart of the pawl i, before described.

Switch K is an exact counterpart of switch J and needs no special description.

Current is supplied to the system from a dynamo-generator F, shown in Fig. l0 as being driven from the engine by a belt F3, though any form of, generator or source ot' electric supply may be utilized. Dynamo F is connected by wire 1 to a manually-operated controller F', provided with a hand-wheel F2 for regulating the strength of the current. Controller F is connected by wire 2 with a binding-post bs on'box B. A Binding-post bs is connected by wire 3 to the resistances R R' R2, the latter being connected to brushes Z4 and Z5, which bear against the end of cylinder t" of switch I, as clearly shown in Fig.,3. Connected to brush Z6 is a wire et, leading to binding-post b9, Fig. 10, thelatter being connected to the dynamo F by wire 5. From brush H a wire 6 leads to one terminal of the winding ot' magnet D, the other terminal being connected to brush H by wire 7. From wire 3 a branch wire S leads to a resistance R R, which is connected by conductors 9 to the brushes ,j5 j and c Zr, which bear on, the ends of shaftsj2 and k2 of the switches J and K, respectively; Brush J of switch J is connected by wire l0 With resistance R2, and

IOO

IIO

IZO

n in turn is connected by wire 19 to branch wire bell-crank lever g of the governor, the lever g being insulated from other parts of the device. Contact 7L is connected by wire 15 to electromagnet t, and the latter is connected by wire 16 to a branch wire 17, connecting electromagnet 7s to wire 4. Contact 7i' is connected by wire `18 to electromagnetj, which 17. Contact h2 is connected by wire 20 to electromagnet 7c, the latter being connected by wire 17 to wire 4.

The operation of the system as thus far described is as follows: As soon as the actual load upon the engine decreases sufiiciently to cause the speed to rise above normal the ballsf of governor E will cause arm G of bellcrank lever g to come in contact with springcontact 7L, which closes the circuit through electromagnet i, the current flowing from generator, through wire 3, wire 12, post 13, wire 14, arm G, contact 7L, wire 15, magnet z', wires 16, and wire 17, to wire 4, back to generator. Magnett'being thus energized,pawlvG is moved thereby for releasing pin Z4, with which it was engaged, and switch I is immediately rotated one-twelfth of a revolution by its belt 7J, the rotation being stopped by the next pin i5 engaging with hook 9 of the pawl. rlhe brushes H and H', which were before restingr on insulated spaces of the cylinder 1l', are now brought over contact-bars, brush -I-l resting on a bai-Z and brush H on a bar Z. At the same time brush Z5 is brought into contact with the bar I under brush H. rlhe main current from the generator then flows from wire 3, through resista-nces R and R2, brush Z5, contact-bar Z, brush H, wire 6, to magnet D, through the coils of the magnet to wire 7, brush H', contact-bar Z', thence through a connection Z2 to shaft 1.2, through brush ZG and Wire 4, back to generator. The magnet D thus energized moves in contact with disk C and by its magnetic force tends to hold the disk against rotation. This action of the magnet puts upon the engine an artificial load which should balance the decrease in actual load that called into action the governing devices, this being regulated by a proper adjustment of the electric contacts controlled by the governor and.

by the strength of current supplied to the magnet, the latter being regulated by the controller F, Fig. 10. The magnet D continues to act on the disk C until the actual load increases suiiiciently to allow the governor E to assume its normal position, when the magnet is instantly withdrawn. Should the actual load continue to decrease beyond the power of the magnet to maintain the normal speed, the balls of governor E will cause arm G to move contact 7L against contact 7L', which will close the circuit through electromagnetj, the current passing from wire 3, through wire 12,

post 13, wire 14, arm G, contacts h and 7L', wire 18, throughmagnet j and wires 19 and 17, to wire 4, back to generator. Magnet j being thus energized, pawl jl is moved thereby from engagement with a pin js to the position shown in Fig. 6, and switch J is immediately rotated by its belt b6 one-twelfth of a revolution, or until the next pinj9 is caught by hook j of the pawl. Brush J', which was before resting on an insulated space, is now brought in contact with a bar m, and a cirof magnet D by cutting out of the -circuit a resistance-R'. Instead of the current passing from wire 8 through resistance R it now flows through wire 8, adjustable resistance R R, conductors 9 to switch J, through brushes j jf, shaft ,72, and conductors ,7'4 to bar m, through brush J and wire 10 to resistance R2, and thence through brush Z5 and switch I to magnet D,as before. Resistance R' is thus cut out of the circuit and the energy of magnet D proportionally increased; but should the power be still insuiiicient tohold the speed to normal, governor E contin ues'- to move arm `Gr until contact 7L' is moved against the contact 72,2, which results in the operation of switch K, the

cuit and still further increasing the power of magnet D. When contact 7L' is moved by arm G against contact h2, current flows from wire 3, through wire 12, post 13, wire 14, arm G, contacts 7L, 72,', and 71,2, wire 20, to electromagnet 7C, thence by way of wire 17 to wire 4, lback to generator. Pawl 7c7- is moved by magnet 7o, and. switch K is revolved onetwelfth of a revolution in the same manner as switch J, before described, so that brush K', which was before resting on an insulated space, is now brought in contact with a bar m'.` The main current then passes from wire 3, through Wire 8, adjustable resistance R R, and conductors 9, to brushes 705 7c, through shaft 702 to the bars m', through brush K' and wire 11 to brush Z5, and through switch I and magnet D, as before described. Resistances R' and R2 are now out of the main circuit, and the magnet D is brought into direct connection with the generator, barring resistance Rv R, which is provided for adjusting the strength of current. Any number of switches J K and resistances R"R2 may be employed, with corresponding contacts controlled by the governor for intermediate.graduations of the braking and governing force.

By employing electricity for applying, varying, and releasing the governing devices the mechanical governor is relieved of actual work beyond making and breaking electric circuits, and as the circuits are closed in quick succession and the closing of each circuit results in increasing the load on the engine the speed control is practically instantaneous and the governor can have no opportunity to move beyond thepoint necessary lto bring into action a power suicient to cuitis completed which increases the strength latter cutting out resistance R2 in the main cir- IOO . actual load is restored to normal, when the equalize any decrease in the actual load that would ordinarily 4result in an increase of speed. l

After the articial load has been applied it is removed only in proportion to the increase in actual load; When the speed begins to slacken, the governor E opens each circuit in succession,which decreases the articial load by cutting in resistance after resistance and decreasing the power of magnet D until the artificial load is enti rely and instantly withdrawn. When the speed of the engine begins to decrease, the governor E first opens the circuit controlling electro magnet c,which instantly releases pawl 757, and the latter is drawn by its spring to its normal or original position. A pin 709 is released bythe pawl 797 and the switch K rotated one-twelfth of a revolution, or until the n'eXt pin is caught by the outer hook of the pawl. An insulated circuit broken through said switch. The current then passes through resistance R2 by way of switch J, as explained. lVhen the governor opens the circuit ot magnet j, switch J is revolved for breaking -the circuit in the Same manner as switch K, and the current then passes through resistances R' R2 to magnet D, as it. did before switch J was brought into action.

Now7 referring to Fig. 8, itwill be noticed that the pins on pulley 3 are arranged so that the distance from a pin 4 to the next pin is one-twelfth of a circle, and the distance from a pin 5 tothe next pin 4 is one-third ot a ci r cle. -When the switch I is in its normal po sition, (shown,) a pi n 4 is engaged by the pawl 6, and ,the brushes H and H' rest on insulated spaces between the bars Z and Z'. When magnet is energized, as already described, pawn"3 releases the pin 4 and engages the next pin 5, the switch being revolved by its belt one-twelfth of a revolution, which brings a bar Z beneath brush H and a bar Z' beneath brush H', current then passing to magnet D, as already described. When governor E breaks the circuit controlling magnet pawl 6 is drawn to its original position by the spring 12, ready to engage the next pin t, which will bring the switch to its original yopen-circuit position; but before the switch reaches its original or normal position it is momentarily arrested in its movement for reversing the circuit and changing t-he polarity ot' magnet D, so that the latter will be instant-ly thrown back from disk C to its original position.

Att-ached to magnet D is a contacto, which when the magnet is in engagement with disk C bears against a contact o' and closes acircuit through battery O and an elect romagnet P, as clearly shown. When magnet P is energized, it attract-s an armature p and moves a leyerp' in the path of the pins 4 on pulley 3, and said leveris so located-that it will engage a pin i4 and arrest the movement ot the switch at the m om en t a ba r Z is beneath brush ljl and a bai-Z beneath brush H', allowing the switch to make one-sixth of a revolution. In this position of the switch brush Z5 will be resting on insulation and brush Z"z will be in contact with the bar Z under brush H', and current will pass from wire, through resistance R, brush Z4, bar Z, brush H', wire 7, and in a reverse direction through magnet D, wire (l, and brush H, to bar Z', conductors Z7, shaft 2, brush Z6, and wire 4, back to generator. This reversalnt' curi-enti minediately changes the polarity ot' magnet D. and the latter is instantly thrown from disk C to its original position. The artificial load is now removed, and 'the circuit through magnet P is broken by the separation of the contacts o and o'. A spring p2 then draws lever p' away from the pin 4, with which it was engaged, and the switch continues its rotation until stopped by the engagement of pin 4 with the pawl 6, all of the devices being then in their normal positions.

The system described may be used either alone or in conjunction with a throttle-com trolling device Without in any mannerincreasing the work of the governor E, such a device being illustrated in Figs. 2, 3, and 9. The throttle R3 (shown in Fig. 2) is regulated fromv a cylinder rthe piston of which is connected to the throttle by a rod o". Steam is admitted to the cylinder for moving its piston and the rod r' through valves which are opened and closed by a rod r2, controlled in its Inovements by what is commonly knownas a floating llink r3. Link r3' is fulcrurned upon the' end otrod r2, and at one end it is connected by a. link r* to rod fr and at the other end it is connected to the core s of a solenoid S, the latter being wound in sections s' s2 s3, which are connected in the circuits controlled by the governor E, as illustrated in dotted lines in Fig. 3. l/Vhen the circuits of the solenoid are broken, the core s is withd rawn from the coils by a spring s4, in which position the throttle is opened to its fullest extent. Section s is connected in the circuit controlling electromagnet section s2 in the circuit controlling electromagnet j, and section S3 in' the circuit controlling electromagnet k. When the circuit of magnet is closed by the governor, section s' becomes energized and draws the core Sintothecoilsapredetermineddistance. The outer end of the link r3 being held bythe rod r', rod r2 will be pushed down for opening a valve controlling theadmission of steam to the cylinder r. The piston of the cylinder' will then move rod r' until the outer end of link r3 is moved thereby suiciently -to raise rod r2 and close the valve. 'lhis movement of rod fr' results in partially closing the throttle R3. Should the circuit of magnetj be closed by the governor, section s2 of the solenoid will become energized, the core s will be drawn still farther into the coils, the steam-valve will again be opened and closed in the same manner by the movements ot rod r2, and the lOO I'Io

t i l i 1 i 1 i r y lits downward movement., and throttle R2 will Yin consequence be entirely closed.

As each circuit is opened by the action ofthe governor -the core s is lifted by a spring s4 and rod r2 is raised thereby for opening another valve which admits steam to the cylinder for moving rodr in a reverse direction and opening Ithe throttle, the action of the floating link ,limiting the movement at each operation, as

It will thus bev will be readily understood. seen that when the brake or artificial load is `applied to the engine the throttle is at the saine time controlled for reducing'the supply 4of steam, and the reduction ofsteam will contin ue as the artificial load increases, and when the latter decreases the steam-supply will be .inc'reased.

.wholly by the strength of current. .modified system illustrated in Fig. 13 the In the system illustrated .in Fig. 3 the'intensity or powerbt niagnetfl) is regulated In the power of the magnet is regulated by the number of coils through which the current is passing. The magnet D`2 here shownis wound with three separate sets of coils, the termi- .nals of the first set being indicated at 21 and 22, vthe terminals of the second set being indicated at 23 and 24, and the terminals of the third set at 25 and 26. T-he governor E and the contacts and circuits controlled thereby are the same before described, and the rotary switches T, T', and T2 are exact counterparts-of switches J and K, and each is operated and controlled in the same manner. The positive and negative wires from the generator are indicated at 3 and 4, and the circuits of the electromagnets are connected as before. tors 27 to the shafts of the three switches T,T', and T2, and the brushes 3, t4, and t5, which nor- Wire 3 is connected by conducmally rest on insulated spaces of the switchcylinders,are connected as follows: Brush t3 is connected by wi re 2S to terminal 21 of the first set of windings of magnet D2, brush #is connected by wire 29 to terminal 23 of the second set of windings, and brush t5 is connected by wire 30 to terminal 25 of the third set ot windings. The other terminals 22, 24, and 26 of the windings are each connected to wire 31, which is in turn connected to wire 4. When the speed of the engine increases, governor E operates to successively close the circuits of magnets t, t', and t2, and the switches T, T', and T2 are revolved one-twelfth of a revolution, as before described. When `the .circuit of magnet t is closed, brush t3 is brought over a contact-bar of the switch-cylinder, and current passes from wire 3 through conductor 27, brush t3, and wire 28, through the rst set of windings of magnet D2, and back to generator through wires 3l and 4. When the circuit of magnet t' is closed,

switch T' is operated'in a similar manner to close the circuit through the second set of windings, and when the circuit of magnet t2 is .closed switch T2 closes the circuit through the third set ot' windings, and as each of the governor-circuits is broken a winding is cut out of the circuit., as will be readily linderstood.

In applying my apparatus to engines of great power and speed I prefer to employ duplicate magnets operating on opposite sides of the diskC, as illustrated in Fig. 1l, both magnets being connected in the system to operate in unison.

In Fig. 12 I have illustrated a mechanical brake which maybe employed in the system illustrated in Fig. 13 in lieu of the electric brake or magnet there shown. This brake consists of a wheel U, keyed to any moving part of' au engine or prime mover and supplied with a snubbing-post-acting band-brake u, anchored as at u and deriving its power from a lever u2. Lever u2 is connected to the core of a solenoid o, the latter being wound in sections in the same manner as the solenoid of the throttle-controlling device before described. The terminals of each section of the solenoid are connected in the system of Fig. 13 in the same manner as the windings of magnet D2, so that each section will be cut into or out of circuit by the governor E in response to Variations in speed andcause the core of the solenoid to apply, vary the power of, and release the brake, as will be readily understood.

When electric brakes are employed, I provide the magnets with water-spaces, as shown at w, Fig. 4, through which water is circulated t'or preventing the magnets from becoming unduly heated from frictional contact'v with disk C. In Fig. I0 I show a system for water circulation in which the magnets are supplied with water by a clipping device w', arranged beneath the ship in position to take in water as the ship moves forward. The brake of Fig-10 is shown as consisting of two magnets operating on opposite sides of the disk, as in Fig. 11. The water-spaceof one magnet is connected at its` bottom to the cupping device w' by a leXible tube to2, and at its top itA is connect-ed by flexible tube 'w3 to the bottom of the water-space of the other magnet, and from the top of this magnet a tube 104 connects to an outlet. ttf. When the ship is in motion, the cupping device forces water through tube to2, to and through the water-space oi one magnet through the connecti'ng-tube w3, to and through the waterspace of the other magnet, and out through the tube 104.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In apparatus for governing and controlling engines or prime movers, the combination of a non-rotatable brake movable to and from a rotating part of the engine or prime IOO IZO

g l t t g mover, means for moving said brake into contact wthsaid rotating part, and means whereby the pressure of said vbrake on the rotating -part will be automatically varied in inverse proportion to variations in the working load carried by the engine, substantially as de- 2. In apparatus for governing'and controlling engines or prime movers, the combina-- tion with a rotating part of -the engine, of a non-rotatable brake movable to and from said rotating part, means formoving said brake into frictional contact therewith, and means for automatically varying the pressure of said brake upon said rotating part in proportion to variations in the speed of the engine, substantially as described.

3. In apparatus for governing and controlling engines orprime movers, the combination of a non-rotatable brake movable to and from a rotating part of the engine, and means for automaticallyvarying the action of said brake in lproportion to variations in the speed of the engine, substantially as' describgd.

4. Inapparatus for governing and controlling engines or prime movers, thecombination with a rotating brake member driven by the engine andpresentinga braking-face, of a non-rotating brake member movable to and from said rotating member and cooperating therewith to retard the speed of the engine, and electrically-actuated means for varying the action of the non-rotatingmember in proportion to variations in the speed of the engine, substantially as described.

5. In apparatus for governing and controlling engines or prime movers', the combination with a moving partof the engine presenting a braking-face, of a non-rotatable electrically-actuated brake movable to and from said moving part, electric circuits for controlling the movements and power of said bra-ke, and a mechanical governor driven by the engine for controlling said circuits, substantiall y as described.

6. In apparatus for governing and controlling engines or prime movers, the combination with a moving portion of the engine, of a brake adapted to be moved into contact therewith for retarding the speed thereof, one or more electromagnets for controllingr the application and power of said brake, a plurality of electric circuits controlling said magnets.,l

and means for automatically making and breaking said circuits for energizing and varying the power of the brake, substantially as described.

'7. In apparatus for governing and cont-rolling enginesor prime movers, the combination with a rotating part ot' the engine, of a metallic braking-face rotating therewith, a non-rotating electromagnetic brake movable to and from said braking-face, means for moving said brake into frictional engagement with said face for retarding the speed of the engine, and means for automatically varying the magnetic power thereof, substantially as described.

8. In apparatus for governing and controlling engines or prime movers, the combination with a rotating part of 'the engine, of a metallic braking-face rotating therewith, a non-rotating electromagnetic brake movable to and from said braking-face, and means for varying the magnetic energy of said brake in proportion to variations in the lspeed ot' the engine, substantially as described.

9. In appara tus for governing and controlling engines or prime movers, the combination with a rotating part of the. engine, of a metallic braking-Face rotating therewith, a non-rotating electromagnetic brake movable to and from `said face, and means for automatically reversing the electric energy supplied to the brake, substantially as described.

l0. In apparatust'or governing and controlling engines or prime movers, the combination of an electromagnetic brake, a plurality of electric circuits for controlling the operation and power thereof, mechanically-driven rotating switches for controlling said circuits and a n'iechanical governor driven by the engine for controlling the operation of the switches, substantially as described.

li. In apparatus forgoverningand c ontrol- ,ling engines or prime movers, the combination with a rotating braking-face, of a nonrotatable brake movable to and from said face, and means whereby the power of said brake will be automatically varied in proportion to variations in the speed of the engine or prime mover, substantially as described.

l2. In apparatus forgoverning and controlling engines er prime movers, the combination of an electric brake adapted to be moved to and from a braking-face, a source of electricsupply, a system ot' electric circuits between the source of supply and said brake adapted to be opened and closed for varying the power of the brake, switches for opening and closing said circuits, and means whereby said switches will be automatically operated by variations in the speed of the engine, substantially as described.

13. In apparatus for governing and controlling engines or prime movers, the combination with a rotating braking-face, of a nonrotatable brake movable to and from said face, and means for automatically applying, varying-the pressure oi", and removing said brake from cont-act with said face, substantially as described.

i4. In apparatus for governing and controlling engines or prime movers, the combination of a centrifugal or other mechanical ing, varying the power of and withdrawing said brake, substantially as described.

15. .In apparatus for governing and controlling engines .or prime movers, the combina-l IOO TIO

IZO

tion of an electromagnetic brake, a source of electric supply, a system of connectingcircuits, switches in said circuits for making i and breaking and reversing the current supplied to the brake, and a mechanical governor drivenA by the engine for controlling the action of said switches, substantially as described.

16. In apparatus for governing and controlling engines or prime movers, the'combination of an electromagnetic'brake, a source of electric supply, connecting-circuits between the brake and source of supply, mechanically-driven rotating switches in said circuits for making and breaking the current, devices for starting and stopping the rotation of said switches, and a mechanical governor driven by the ,engine'for controlling said starting and stopping devices, substantially as described.

17. In apparatus for governing and controlling engines or prime movers,the combination ofan electromagnetic brake, a source of electric supply, a system of connecting-circuits, mechanically-driven rotating switches` in said circuits for making, breaking and reversing the current supplied to the brake, devices for starting and stopping the rotation of the switches, and a mechanical governor for controlling said startin g and stopping devices, substantially as described.

18. In apparatus for governing and controlling engines or prime movers, the combination of an electromagnetic brake, a source of electric supply, a s-ystem of electric circuits between the brake and source of supply, switches in said circuits for making, breaking and reversing the current to the brake, electrically-actuated devices for controlling the operation of said switches, auxiliary circuits for controlling said devices, and a mechanical governor driven by the engine for making and breaking said auxiliary circuits, substantially as described.

19. In apparatus for governing and controlling engines or prime movers, the combination of an electrically-actuated brake movable to and from a rotating braking-face, a source of electric energy, a connecting-circuit, and means for automatically varying the resistance of said circuit, substantially as described.

20. In apparatus for governing and controlling engines or prime movers, the combination with a driving-shaft which is lpractically immovable longitudinally, and its load, of means for automatically applying, varylng and removing an articial load in inverse proportion to variations in the Working load,

substantially as described.

21. In apparatus for governing and controlling engines or prime movers', the combination with a moving part of the engine, of an electrically-actuated brake adapted to engage therewith for retarding the speed of the engine, electric circuits for controlling-the application and power of the brake, and means .for automatically sending current to the operating-coils of the brake in a reverse direction to the normal braking-current for quickly demagnetizing and reversing them, substantially as described.

22. In apparatus for governing and controlling engines or prime movers, the combination with a rotating braking-face, of an electrically-actuated brake movable to and from said face, electric circuits for controlling the movements and power of said brake, and means responsive to variations in the load carried by the engine for controlling and rc- -versing the current in said circuits, substantially as described.

23. In apparatus for governing and controlling engines or prime movers, the combination with an electromagnetic brake, of means for sending current through the coils thereof, and a device for automatically making and breaking and reversing the normal braking-l current, substantially as described.

24. As a governor for prime movers, the combination of a water-jacketed electromagnetic brake, means for automatically actuating said brake, and means for circulating water through the water-jacket of the brake, substantially as described.

25. As a governor for prime movers, adisk rotatably connected with the shaft of the mover, presenting a moving face, an electromagnet movable to and from the Vface of the disk, and a plurality of means for varying the electrical supply to the magnet, substantially as described.

26. As a governor for prime movers, a disk rotatably connected with the shaft of the mover, presenting a moving face, an electromagnetic system, presenting a magnetic surface movable to and from the face of such disk, means for varying the electrical supply to the magnet, responsive to the speed changes of the prime mover, and an independent manuallyactuated means for controlling the strength of the current, substantially as described.

27. In a governor for engines or prime movers, a disk rotatively connected to the shaft of the mover presenting a braking-face, an electromagnetic system presenting a non-rotatable magnetic surface movable to and from the face of said disk, and means actuated by a centrifugal or other m echanical governor for varying the.electricahenergysupplied to the magnet, substantially as described.

2S. As a governor for prime movers, a disk rotatably connected with the shaft of the mover presenting a moving face, an electromagnetic system presenting a magnetic surface movable to and from the face of such disk, and means for automatically reversing the direction of the current in the magnet, substantially as described.

29. As a governor for prime movers, adisk rotatably connected with the shaft of the mover presenting a moving face, an electromagnetic system presenting a magnetic surface movable to and from the face of such IOO IIO

disk, means for varying the electrical supply to the magnet, and an automatically-operated step-by-step controller for the electrical circuits of the magnet, substantially as described. A

30. As a governor for prime movers, a disk rotatably yconnected with the shaft of the mover presenting a moving face, an electromagnetic' system presenting a magnetic surface movable to and from the face of such disk, means for varying` the electrical supply to the magnet, andmeans called into action by the motion' of one of the braking members for reversing the -direction et' current tothe brake, substantially as desc ibed.

3l. In apparatus -for governing andco trolling engines or prime movers, the com ination with an engine-driving shaft, of 1 rotatable and a non-rotatable brake elei ent, and means for -moving one of said elel ents into frictional contact with the other independently of any movement of said shaft for retarding the speed thereof, substantially as described,

32. In apparatus for governing and controlling engines or prime movers, an electrical braking device and a centrifugal governor,

' botll rotatably connected with a moving part, a source of electrical supply, rotating switches driven byj the engine for handling the electrical energy to the brake, devices for holding said switches 'against rotation and operating connections between said devices and the governor, substantially as described. .Y

34. In an electrical braking system for' movers, a power-driven electrical switch for controlling the electrical energy to the brake, a catch for holding the switch out of action, and means operated bya centrifugal governor for actuating the catch.

35. As a governor for marine engines, a

pair of centrifugal governors, oppositelymoving parts, one actuated by each of said governors, and means for mechanically coupling the parts, substantially as described.

36. In an electric bgake'for engines or prime movers, Aa brakiing-"face constituted of a plurality of electromagnetic poles, and a plurality of conductors suitably disposed with ret'- er'ence to the poles, each adapted .to be independently excited,substantially asdescribed. 37. In an electromagnetic friction device, a disk having circular grooves in its-face, transverse grooves connecting the circular grooves leaving sector-like projections, and windings disposed within the grooves, wound upon three sides only of the said projections,

substantially as described.

ELMER A. SPERRY. 

